Selective signaling system.



E. R. GILL.

SELECTIVE SIGNALING SYSTEM.

APPLICATION FILED SEPT.18, 1909.

Patented Meir. 31, 1914.

WITNESSES:

I ing.

srirrsn Tarps LFENT :FFICE.

EDWIN R. GILL, OF YONKERS. NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS, TO HALL SWITCH 62: SIGNAL COMPANY, ACORPORATION OF MAINE.

SELECTIVE SIGNALING SY$TE1VL Specification of Letters Patent.

To all whom it may concern:

.Signaling Systems, of which the following is a specification. l

Thisinvention relates to signaling systems and. more particularly to such systems as are applicable to telephonic, train despatch- The present invention contemplates particularly a simple form of answer back, whereby upon'closing a local circuit'at a distance by means of selective mechanism connected with the main circuit, the opera tor may be instantly apprised of the successful operation of the circuit closer.

Other objects will be in part obvious and in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations of elements and arrangements of parts, which will be exemplified in the construction hereinafter described, and the scope of the application of which will be indicated in the following claims.

In the accompanying drawings in which are illustrated two preferred forms of vari ous embodiments of my invention: Figure l is a diagrammatic View of one embodiment thereof; and Fig. 2 is a similar view. of a slightly different embodiment.

Similar reference characters refer to similar parts in both figures of the drawings.-

Referring now to the drawings, and particularly to Fig. 1, the view may be said to illustrate diagrammatically a signaling'device, wiring and operating device in areceiving station of a telephonic train despatching circuit. 1 and 2 respectively denote opposite sides of the main telephone line and connected in bridge thereof as by wires 3 and 4 is a telephone 5. Located in a bridge 6 of the main telephone line is a selector indicated diagrammatically at 7. This selector which may be of any approved type is preferably an instrument such as is described in Letters Patent No. 906.523 issued to me December 15, 1908. and includes magnets 8 and 10 upon which are positioned coils '11 and 12 of the bridge 6. Impulses impressed upon the main lineenergizing these coils effect the operation of mechanism (not shown) to operate a circuit closer 13 which cooperates with a contact 14 to close a local circuit 15. This local circuit is provided with a suitable source of current sup ply as a battery 16, andhas included therein anelectro-magnetic signal 17 which may take the form of an ordinary electric bell. 18 denotesan electro-magnet and positioned thereon is a .coil 20, said coil comprising a portion of the local circuit 15. In the cuit are positioned upon the magnets 8 and Patented Mar. 31, 1914. Application filed September 18, 1909. Serial Nb. 518,390. i

present instancecoils 21 and 22 of the local cir- 10 of the selector. Located in a bridge 23 of the main line is acoil 24 which is positioned upon the electro-magnet 18 thereof and is in inductive relation with the coil 20 of the local circuit. It will be noted also that the.

coils. 21 and 22 of the local circuit are in inductive relation with the coils 11 and 12 of the bridge 6. In the present embodiment of my invention choke coils 25 and 26 are located in the bridge 6. The function of these coils which may be located on one or both sides of the selector is to slow down or cushion the rapidly undulating and oscillat- Having described this embodiment of my invention the operation thereof may now be understood.

The operation of the answer back depends upon the inductive effect of the undulatory orinterrupted current set up in the local signal circuit by the direct action of the interruption which forms a part of the-local signal. 'Thiscurrent passing-through the coil 20 which acts as a primary, while the magnet 18 acts as a converter core, sets up by induction a corresponding alternating current in the mainline by means of the bridge 23. This alternating current causes a buzzing in the receiver of the train despatchers telephone, which apprises him of the fact that, the desired station has been called and'the signal therein operated.-

In the present embodiment of my invention coils of the local circuit 15 are shown as positioned upon the magnet 18 as well as upon the magnets 8 and 10 of the selector, and therefore said coils are in inductive relation with the coils of both the bridges G and 23. It will be understood of course that the coils upon the selective magnet may be omitted without in any Way departing from the spirit or scope of the invention. l

mg currents such as those impressed upon telephone clrcuits and those due to lightning.

tion an alternating current'in the-main line;

which so afi'eots the diaphragmyof the despatchers receiving instrument as to notify him that the proper station hasbeen called and its signalv operated.

"It willaccordingly be seen that I have provided an";apparatus'well adapted to atqtain 'anic' n'g others all the ends and objects I I manner.

above enumerated in a simple-yet efficient Asmany cha'ngesdco-uld be made in the above construction and many apparentlywidely different embodiments of this mvention could be made withoutdeparting from thescope thereof, it is intended that all'matter contained in the above description or shown in the accompanyin'g drawings shall be ,interp reted as illustrative and not in'a limitingsense. It is also to be understood that the langua e used in the following claims is intended to cover all of the generic and specific features of the invention herein Copies ofthi: patent may be obtained for described and all statements of the scope of the invention, which as a matter of language, might be said to fall thereb'etween.

I Having thus described my invention, what I claim as new anddeslre to ters Patentis:

secure by Let- 1. A. signaling system comprising a main line, select1ve mechanism connected to said ,main line, a local circuitincluding an electro-'-magnetic signal, a circuit closer for said ..local circuit adapted tob'e operated by, said selective mechanism, an elcctro-magnet, said local circuit having a coil onsaid electromagnet, and a second coil on said magnet connected with the main line.

local circuit,

2. A signaling system comprising a main line, selective apparatus connected to said main line, a local circuit including an. elec tro-m'agn'etic signaling device, an electromagnet, a coil infsaid local circuit located upon said electro-Inagnet, a coil upon said electro-magnet'.connected in bridge-of the main line, and a circuit closer operated by sa1d selective mechanism for clos ng said A signaling system comprising a main line, selective mechanism connected in bridge of the line, a local circuit comprising an electro-magnet and an electro-magnetic signal,- saidlocal circuit having a coil upon saidelectro-magnet, and'a second coil upon A signaling sy m Comprising main line, a selective signal operator having coils I connected -1n bridge of the mam line, an

electro -magn'et, an electromagnetic signaling device, a local circuit for said signaling device including one or morefcoils on said electro-magnet-, -a second coil upon said electro-magnet connected with the main line, and'means for closing said local c1rcu1t arranged to' be operated by said selective s1g-' nal operator.

5; A slgnalmg system comprising a main line, a selectlve signal ng operator having coils connected in bridge .of the main line, an electro-magnet, an electro-magnetic slgnaling device, a local Cl-IClllt for said signaling device includinga coil on said electror magnet and one or. more coils located inc-inductive relatlon w1th the (30118 of the selec tive signal operator, a second coil upon said electro-magnet connected in bridge of the mainline, and means for closing said local circuit arranged to be operated by said selective signal operator.

'-In witness whereof I affix my signature in the presence oftwo witnesses.

. 1 EDWIN R. GILL.

WVitnesses: v- I FRANK J. KENT, I BLANCHE W. GOULDOCK.

five cents each, by addressing the Commissioner Of PatOIItI, Washingtom-ROL said electro-magnet connected "in bridge 015 -65 the main line. 

